Mounting for an opening roller

Abstract

In the case of a mounting for an opening roller comprising a plurality of teeth, all the tooth faces and the tooth backs are inclined in rotational direction. At their tips, the tooth faces form an angle relative to an opening roller radial plane of between 10° and 30° . The tooth backs are more inclined to the radial plane at the tooth tips than at the tooth bases. The tooth backs are inclined at the tooth tips in such a way that an extension of the tangent to the tooth back at the tooth tip intersects the tooth face of the following tooth at an intersecting point which is between one-fifth and four-fifths of the tooth height of the following tooth. At least one-half of a tooth height from the tooth tip to the tooth base has a roller circumferential direction width which is at least as large as the distance between the back of the respective tooth and the face of a next adjacent following tooth.

What is claimed is: 
     
       1. A mounting for an opening roller of an open-end spinning machine comprising a plurality of teeth arranged one behind the other in a plurality of rows extending essentially in circumferential direction, wherein tooth faces and tooth backs of the teeth are inclined in rotational direction, the tooth back being more inclined in an area of a tooth tip than at a tooth base, the tooth face forming an angle to a roller radial plane of between 10° and 30°,   and wherein the tooth back is inclined at the tooth tip to the radial plane such that an extension of the tangent to the tooth back at the tooth tip intersects the tooth face of a following tooth at an intersecting point which is between one fifth and four fifths of a tooth height from the tooth tip to the tooth base.   
     
     
       2. A mounting according to claim 1, wherein, at the start of a second fifth of the tooth height, measured from the tooth base, a distance between the tooth face and the tooth back of a next adjacent tooth measures 0.5 to 1.4 times the tooth height. 
     
     
       3. A mounting according to claim 2, wherein the teeth are arranged in circumferential direction so that the spacing between the teeth measures between 0.8 and 1.6 times the tooth height. 
     
     
       4. A mounting according to claim 3, wherein the tooth back graduates at the tooth base through a curve into the tooth face of the following tooth. 
     
     
       5. A mounting according to claim 4, wherein, at the start of a second fifth of the tooth height, measured from the tooth base, a distance between the tooth back of a tooth and the tooth face of the following tooth measures between 0.6 and 1.2 times the distance between the tooth back and the tooth face of one single tooth. 
     
     
       6. A mounting according to claim 5, wherein the angle formed at the tooth tip between the tooth back and the radial plane measures between 35° and 70°. 
     
     
       7. A mounting according to claim 5, wherein the angle (δ) formed at the tooth tip between the tooth back and the tooth face measures between 25° and 60°. 
     
     
       8. A mounting according to claim 7, wherein the tooth face comprises a concavely curved section. 
     
     
       9. A mounting according to claim 8, wherein the tooth back comprises a hump, adjacent to which hump is a section which is more inclined relative to the radial plane in the direction of the tooth tip, and also adjacent to which hump is a section less inclined relative to the radial plane in the direction of the tooth base. 
     
     
       10. A mounting according to claim 1, wherein the teeth are arranged in circumferential direction so that the spacing between the teeth measures between 0.8 and 1.6 times the tooth height. 
     
     
       11. A mounting according to claims 1, wherein the tooth back graduates at the tooth base through a curve into the tooth face of the following tooth. 
     
     
       12. A mounting according to claim 1, wherein, at the start of a second fifth of the tooth height, measured from the tooth base, a distance between the tooth back of a tooth and the tooth face of the following tooth measures between 0.6 and 1.2 times the distance between the tooth back and the tooth face of one single tooth. 
     
     
       13. A mounting according to claims 1, wherein the angle formed at the tooth tip between the tooth back and the radial plane measures between 35° and 70°. 
     
     
       14. A mounting according to claims 1, wherein the angle (δ) formed at the tooth tip between the tooth back and the tooth face measures between 25° and 60°. 
     
     
       15. A mounting according to claim 1, wherein the tooth face comprises a concavely curved section. 
     
     
       16. A mounting according to claim 1, wherein the tooth back comprises a hump, adjacent to which hump is a section which is more inclined relative no the radial plane in the direction of the tooth tip, and also adjacent to which hump is a section less inclined relative to the radial plane in the direction of the tooth base. 
     
     
       17. A mounting according to claim 16, wherein the at least one of more inclined section and the less inclined section extend at least partly straight. 
     
     
       18. A mounting according to claim 17, wherein the hump comprises a convexly curved section, at which the more steeply inclined section graduates into the less steeply inclined section. 
     
     
       19. A mounting according to claim 16, wherein the hump comprises a convexly curved section, at which the more steeply inclined section graduates into the less steeply inclined section. 
     
     
       20. A mounting for an opening roller of an open-end spinning machine comprising a plurality of teeth arranged one behind the other in a plurality of rows extending essentially in circumferential direction, wherein tooth faces and tooth backs of the teeth are inclined in rotational direction, the tooth back being more inclined in an area of a tooth tip than at a tooth base, the tooth face forming an angle to a radial plane of between 10° and 30°,   and wherein at least one-half of a tooth height from the tooth tip to the tooth base has a roller circumferential direction width which is at least as large as the distance between the back of the respective tooth and the face of a next adjacent following tooth.   
     
     
       21. A mounting according to claim 20, wherein the tooth back graduates at the tooth base through a curve into the tooth face of the following tooth. 
     
     
       22. A mounting according to claim 20, wherein the angle formed at the tooth tip between the tooth back and the radial plane measures between 35° and 70°. 
     
     
       23. A mounting according to claim 20, wherein the angle formed at the tooth tip between the tooth back and the tooth face measures between 25° and 60°. 
     
     
       24. A mounting according to claim 20, wherein the tooth face comprises a concavely curved section. 
     
     
       25. A mounting according to claim 20, wherein the tooth back comprises a hump, adjacent to which hump is a section which is more inclined relative to the radial plane in the direction of the tooth tip, and also adjacent to which hump is a section less inclined relative to the radial plane in the direction of the tooth base. 
     
     
       26. A mounting according to claim 25, wherein the at least one more inclined section and or the less inclined section extend at least partly straight. 
     
     
       27. A mounting according to claim 26, wherein the hump comprises a convexly curved section, at which the more steeply inclined section graduates into the less steeply inclined section.